Atomic String

MapReduce: Simple data processing on large cluster

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the NoSQL database distributed special ...

Here is a translation of the Redis Official document "A fifteen minute introduction to Redis data Types", as the title says, The purpose of this article is to allow a beginner to have an understanding of the Redis data structure through 15 minutes of simple learning. Redis is a kind of "key/value" type data distributed NoSQL database system, characterized by high-performance, persistent storage, to adapt to high concurrent application scenarios. It started late, developed rapidly, has been many ...

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the distributed features of the NoSQL database ...

Learn how to use the type-aware and pattern-aware XSLT 2.0 in debugging and http://www.aliyun.com/zixun/aggregation/8775.html > Test processes to avoid invalid paths to data types and cardinality, Common problems with error assumptions. In addition, this article provides examples of XSLT style representations that contain errors that cannot be caught without using the pattern-aware attribute. You will learn how to explicitly specify type results in useful error messages ...

This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

Because it was two days ago there is a silly B writing long black "internet thinking" is a scam and so on, well, carving ye now to get a long text, one-time crucify those waste firewood. You remember, in the future, there are idiots to say "no internet thinking", you let them kneel to read my article Xiongwen good. First you have to figure out what is "not internet thinking", lest the "Headquarters building Trap", as the author of "The Foundation of Evergreen" has cited, finds that the world's top 500 companies have a headquarters building, so whether they can conclude that owning a headquarters building is a necessary condition for the world's top 500? This ...

Hadoop RPC communication is different from other systems RPC communication, the author for the use of Hadoop features, specifically designed a set of RPC framework, the framework of personal feeling is still a little complicated. So I'm going to split into client-side and Server service-side 2 modules for analysis. If you have a good understanding of RPC's entire process, you must be able to understand it very quickly for Hadoop RPC. OK, let's cut to the chase. The related code for the RPC of Hadoop is ORG.APAC ...

In http://www.aliyun.com/zixun/aggregation/13713.html ">hbase:the definitive Guide, Lars George introduced a new feature of HBase Counter Increment, which uses a column as a Counter, makes it easy to provide real-time statistical functionality for some online applications. PS: For example, post ...

Naresh Kumar, a software engineer and enthusiastic blogger, has great interest in programming and new things, and is happy to share technical research results with other developers and programmers. 　　Recently, Naresh wrote about 12 well-known free, open source NoSQL databases, and analyzed the characteristics of these databases. Now that the NoSQL database is becoming more and more popular, I'm here to summarize some of the great, free and open source NoSQL databases. In these databases, MongoDB the top, with considerable ...